﻿using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelBookingSystem
{
    public interface IClient
        {
            int RegisterClient(string firstName, string lastName, string emailAddress);
            void UnregisterClient(int id);
            ArrayList GetClient(int id);
            void ChangeEmailAddress(int id, string emailAddress);
        }
}
